/* Groove Dice — Ember Signal visual language */
:root {
  --bg: #0f1218;
  --surface: #171b24;
  --surface-2: #1e2430;
  --rule: #2a3140;
  --fg: #eef0ea;
  --dim: #9aa3b2;
  --orange: #ff9d32;
  --cyan: #4fd8d0;
  --green: #7fd88f;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 15px;
  line-height: 1.35;
  min-height: 100vh;
}

.topbar {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 12px; padding: 12px 16px; border-bottom: 1px solid var(--rule);
}
.brand {
  font-size: 22px; font-weight: 800; letter-spacing: 0.08em;
  margin: 0; text-transform: uppercase;
}
.brand-accent { color: var(--orange); margin-left: 6px; }
.status { margin: 0; color: var(--cyan); font-size: 12px; letter-spacing: 0.12em; }
.status.blocked { color: var(--orange); }

.instrument {
  max-width: 1180px; margin: 0 auto; padding: 12px;
  display: grid; gap: 12px; min-width: 0;
}
.panel {
  background: var(--surface); border: 1px solid var(--rule);
  border-radius: 4px; padding: 12px; min-width: 0;
}

/* transport */
.transport-row {
  display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
}
.dice-block { display: flex; flex-direction: column; align-items: center; gap: 2px; }
.die-btn {
  background: none; border: none; cursor: pointer; padding: 4px;
  min-width: 52px; min-height: 52px; touch-action: manipulation;
  transition: transform 120ms ease;
}
.die-btn:hover, .die-btn:focus-visible { transform: rotate(-10deg) scale(1.06); outline: 2px solid var(--orange); outline-offset: 2px; }
.die-btn:active { transform: scale(0.94); }
.die-label { font-size: 11px; letter-spacing: 0.18em; color: var(--orange); font-weight: 700; }

.btn {
  background: var(--surface-2); color: var(--fg);
  border: 1px solid var(--rule); border-radius: 3px;
  padding: 10px 18px; font-weight: 700; letter-spacing: 0.1em;
  cursor: pointer; font-size: 13px; text-transform: uppercase;
}
.btn:hover { border-color: var(--orange); }
.btn:focus-visible { outline: 2px solid var(--cyan); outline-offset: 1px; }
.btn-primary.playing { background: var(--orange); color: #10130a; border-color: var(--orange); }
.btn.small { padding: 6px 10px; font-size: 11px; }
.active-toggle { border-color: var(--cyan); color: var(--cyan); }

.transport-settings {
  display: grid;
  grid-template-columns: minmax(150px, 1.4fr) minmax(130px, 1fr) 86px;
  gap: 8px;
  align-items: end;
  flex: 1 1 430px;
  min-width: 0;
}
.transport-settings label { display: flex; flex-direction: column; gap: 4px; font-size: 10px; letter-spacing: 0.16em; color: var(--dim); min-width: 0; }


.seed-mode-stack {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 6px;
  min-width: 0;
}
.mode-block { display: flex; flex-direction: column; gap: 4px; order: 0; }
.mini-label { font-size: 10px; letter-spacing: 0.16em; color: var(--dim); }
.segmented {
  display: inline-flex; border: 1px solid var(--rule); border-radius: 3px; overflow: hidden;
}
.seg-btn {
  background: var(--surface-2); color: var(--dim); border: none;
  padding: 12px 20px; font-weight: 800; letter-spacing: 0.12em;
  cursor: pointer; font-size: 13px; min-width: 96px; min-height: 44px; touch-action: manipulation;
}
.seg-btn + .seg-btn { border-left: 1px solid var(--rule); }
.seg-btn.active { background: var(--orange); color: #10130a; }
.seg-btn:focus-visible { outline: 2px solid var(--cyan); outline-offset: -2px; }

.vol-block { display: flex; flex-direction: column; gap: 2px; min-width: 140px; }
.vol-block label { display: flex; justify-content: space-between; font-size: 11px; letter-spacing: 0.12em; color: var(--dim); }
.vol-block output { color: var(--fg); }

.settings-row {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 8px 14px; margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--rule);
}
.settings-row label {
  display: flex; flex-direction: column; gap: 4px;
  font-size: 10px; letter-spacing: 0.16em; color: var(--dim); min-width: 0;
}
select, input[type="text"] {
  background: var(--surface-2); color: var(--fg);
  border: 1px solid var(--rule); border-radius: 3px; padding: 6px 8px;
  font: inherit; width: 100%;
}
select, input[type="text"] { min-height: 44px; }
input[type="text"].invalid { border-color: var(--orange); color: var(--orange); }
input[type="range"] {
  -webkit-appearance: none; appearance: none;
  height: 44px; background: transparent; width: 100%; min-width: 0; cursor: pointer; touch-action: manipulation;
}
input[type="range"]::-webkit-slider-runnable-track {
  height: 4px; background: var(--rule); border-radius: 2px;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 16px; height: 16px; margin-top: -6px; border-radius: 50%;
  background: var(--orange); border: 2px solid var(--bg);
}
input[type="range"]::-moz-range-track { height: 4px; background: var(--rule); border-radius: 2px; }
input[type="range"]::-moz-range-thumb {
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--orange); border: 2px solid var(--bg);
}
input[type="range"]:focus-visible { outline: 2px solid var(--cyan); }

/* sequencer */
.seq-head { display: flex; align-items: center; gap: 14px; margin-bottom: 10px; flex-wrap: wrap; }
.seq-head h2 { margin: 0; font-size: 14px; letter-spacing: 0.2em; }
.bar-selector { display: inline-flex; border: 1px solid var(--rule); border-radius: 3px; overflow: hidden; }
.bar-tab {
  background: var(--surface-2); color: var(--dim); border: none; cursor: pointer;
  min-width: 40px; padding: 8px 0; font-weight: 700; font-size: 12px;
}
.bar-tab + .bar-tab { border-left: 1px solid var(--rule); }
.bar-tab.active { background: var(--cyan); color: #06231f; }
.bar-tab.fill-mark::after { content: "F"; color: var(--orange); margin-left: 4px; font-size: 10px; }
.bar-tab.active.fill-mark::after { color: #06231f; }
.seq-actions { margin-left: auto; display: flex; gap: 8px; }

.grid {
  display: grid; gap: 3px;
  grid-template-columns: 84px repeat(var(--slots), minmax(0, 1fr));
  position: relative; --lane-label-width: 84px;
}
.lane-label {
  font-size: 11px; letter-spacing: 0.1em; color: var(--dim);
  display: flex; align-items: center; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.cell {
  aspect-ratio: 1 / 1.05; border-radius: 2px; border: 1px solid var(--rule);
  background: var(--surface-2); cursor: pointer; padding: 0; position: relative;
  touch-action: none; min-width: 0;
}
.cell.beat { border-color: #39435a; }
.cell.on { background: var(--orange); border-color: var(--orange); }
.cell.reserved { display: none; }
.cell.on.vel-ghost { opacity: 0.28; }
.cell.on.vel-soft { opacity: 0.48; }
.cell.on.vel-mid { opacity: 0.72; }
.cell.on.vel-accent { opacity: 1; }
.velocity-palette { display: flex; align-items: center; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.velocity-palette .mini-label { margin-right: 4px; }
.palette-btn { border: 1px solid var(--rule); background: var(--surface-2); color: var(--fg); min-height: 44px; padding: 7px 9px; font: inherit; font-size: 11px; letter-spacing: 0.08em; cursor: pointer; touch-action: manipulation; }
.palette-btn small { color: var(--dim); font-size: 9px; }
.palette-btn.active { border-color: var(--orange); color: var(--orange); box-shadow: inset 0 -2px var(--orange); }
.palette-btn.erase.active { border-color: var(--cyan); color: var(--cyan); box-shadow: inset 0 -2px var(--cyan); }
.grid.playing::after {
  content: ""; position: absolute; z-index: 2; top: 0; bottom: 0;
  left: calc(var(--lane-label-width) + ((100% - var(--lane-label-width)) * (var(--playhead-slot) + 0.5) / var(--slots)));
  width: 2px; background: rgba(79, 216, 208, 0.8); box-shadow: 0 0 8px rgba(79, 216, 208, 0.55);
  pointer-events: none;
}
.cell:focus-visible { outline: 2px solid var(--cyan); outline-offset: 1px; z-index: 1; }
.hint { color: var(--dim); font-size: 11px; margin: 10px 0 0; }
.origin-note { border-top: 2px solid var(--orange); }
.origin-note h2 { margin: 0 0 12px; font-size: 14px; letter-spacing: 0.2em; }
.origin-note p { max-width: 860px; margin: 0 0 10px; color: var(--dim); line-height: 1.65; }
.origin-note p:last-child { margin-bottom: 0; color: var(--fg); }
.foot { color: var(--dim); font-size: 11px; padding: 4px 4px 20px; }
.foot p { margin: 2px 0; }
.foot a { color: var(--cyan); }
.lab-backlink { display: inline-block; margin-top: 8px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; }

@media (max-width: 720px) {
  .transport-row { gap: 10px; }
  .transport-row .btn { min-height: 44px; }
  .seed-mode-stack { flex: 1 1 150px; }
  .transport-settings { flex: 1 1 100%; grid-template-columns: 1.4fr 1fr 86px; }
  .vol-block { min-width: 0; }
  .seq-actions { margin-left: 0; width: 100%; }
  .grid { grid-template-columns: 36px repeat(var(--slots), minmax(0, 1fr)); gap: 2px; --lane-label-width: 36px; }
  .cell { aspect-ratio: auto; min-height: 32px; }
  .lane-label { font-size: 10px; letter-spacing: 0.03em; justify-content: center; }
  .seq-head { align-items: stretch; }
  .seq-actions { flex-wrap: wrap; }
  .seq-actions .btn { min-height: 44px; }
}